依靠dba_hist_tbspc_space_usage视图 获得表空间的每日增长量

select a.name, b.*  
 from v$tablespace a,  
      (select tablespace_id,  
              trunc(to_date(rtime, 'mm/dd/yyyy hh24:mi:ss')) datetime,  
              round(max(tablespace_usedsize * 8 / 1024),2) used_size_MB  
         from dba_hist_tbspc_space_usage  
        where trunc(to_date(rtime, 'mm/dd/yyyy hh24:mi:ss')) >  
              trunc(sysdate - 17)  
        group by tablespace_id,  
                 trunc(to_date(rtime, 'mm/dd/yyyy hh24:mi:ss'))  
        order by tablespace_id,  
                 trunc(to_date(rtime, 'mm/dd/yyyy hh24:mi:ss'))) b  
where a.ts# = b.tablespace_id and a.name='USERS';

NAME                           TABLESPACE_ID DATETIME  USED_SIZE_MB
------------------------------ ------------- --------- ------------
USERS                                      4 07-OCT-16    724031.67
USERS                                      4 08-OCT-16    725213.05
USERS                                      4 09-OCT-16    725907.55
USERS                                      4 10-OCT-16    726093.98